How do project names, class names, and file names relate to one another in GDB's Java?

Question

Using Java on this platform, does every project consist of a main class with a  main method (and others as needed), or can I use the project name for the class name?

Answer 1

you can use the project name as class name, but you have to rename the file name from main.java to your projectname.java

Answer 2

package com.example;

public class MyClass {
    public native void sayHello();
}